Collection of Samples From Subjects With Various Skin Conditions and Healthy Volunteers

Inclusion Criteria22

• All subjects:
• Subject is willing to participate and is capable of giving informed consent. Note: Consent must be obtained prior to any study-related procedures.
• Subject must be willing to comply with all study procedures and must be available for the duration of the study.
• Healthy volunteers:
• Male or female subject aged 18 years or older, at the time of consent.
• Subject is in good general health, according to the investigator's judgment.
• Subjects with Acne:
• Male or female subject aged 18 to 45 years old, inclusive, at the time of consent.
• Subjects with AD:
• Male or female subject aged 18 years or older, at the time of consent.
• Subject has clinically confirmed diagnosis of active AD, according to Hanifin and Rajka criteria.
• Subjects with CHE:
• Male or female subject aged 18 years or older, at the time of consent.
• Subject has at least a 6-month history of CHE before Screening (information obtained from medical chart or subject's physician, or directly from the subject).
• Subjects with HS:
• Male or female subject aged 18 years or older, at the time of consent.
• Subject has a clinically confirmed diagnosis of active HS with a disease duration of ≥ 6 months before screening as determined by the investigator through subject interview and/or review of the medical history.
• Subjects with PPP:
• Male or female subject aged 18 years or older at the time of consent.
• Subject has at least a 6-month history of PPP as defined by the presence of pustules on palms and/or soles, but without evidence of infection on palms and soles (information obtained from medical chart or subject's physician, or directly from the subject).
• Subjects with psoriasis:
• Male or female subject aged 18 years or older, at the time of consent.